Merge branch '4.6' of scm.dev.nokia.troll.no:qt/oslo-staging-2 into 4.6-integration

* '4.6' of scm.dev.nokia.troll.no:qt/oslo-staging-2: (42 commits)
  Cleanup after "Changed qgraphicswidget autotest to use qWaitForWindowShown"
  Cleanup after "QGraphicsWidget is painted twice on the first show"
  Changed qgraphicswidget autotest to use qWaitForWindowShown.
  Improved QTest::qWaitForWindowShown on X11.
  Stabilize tst_QGraphicsWidget::initialShow2 (new test)
  Make sure we define S_IFDIR on Windows
  Fix copy/pasto
  Crash when closing any top-level widget on Symbian.
  Cache the sizes of the images in an animated GIF.
  Fix the QAbstractSlider autotest.
  Use OpenVG scissor on 90/180/270 rotations and simple clips.
  Optimize single-rect IntersectClip in OpenVG using the scissor
  QGraphicsWidget is painted twice on the first show.
  Compiler warning in QAbstractSlider.
  Optimize QPathClipper::pathToRect.
  QGraphicsScene: Use QPainter::setClipRect instead of setClipPath if possible.
  QStyleSheetStyle: Fix combinaison of border-image and border-radius
  Revert "QAbstractScrollArea: Wheel over a scrollarea that has only one horizontal scrollbar"
  Proper Fav icon is not shown, for all the links default fav icon shown
  Update changes-4.6.2.
  ...

36 files changed, 589 insertions, 164 deletions

diff --git a/src/3rdparty/phonon/ds9/videowidget.cpp b/src/3rdparty/phonon/ds9/videowidget.cpp
index 091be16..95423c6 100644
--- a/src/3rdparty/phonon/ds9/videowidget.cpp
+++ b/src/3rdparty/phonon/ds9/videowidget.cpp
@@ -218,6 +218,9 @@ namespace Phonon
             if (toNative && m_noNativeRendererSupported)
                 return current; //no switch here
 
+            if (!mediaObject())
+                return current;
+
             //firt we delete the renderer
             //initialization of the widgets
             for(int i = 0; i < FILTER_COUNT; ++i) {
diff --git a/src/corelib/kernel/qabstractitemmodel.cpp b/src/corelib/kernel/qabstractitemmodel.cpp
index dbf422e..36e4af9 100644
--- a/src/corelib/kernel/qabstractitemmodel.cpp
+++ b/src/corelib/kernel/qabstractitemmodel.cpp
@@ -1006,6 +1006,9 @@ void QAbstractItemModelPrivate::columnsRemoved(const QModelIndex &parent,
     Returns the child of the model index that is stored in the given \a row and
     \a column.
 
+    \note This function does not work for an invalid model index which is often
+    used as the root index.
+
     \sa parent(), sibling()
 */
 
diff --git a/src/gui/dialogs/qfiledialog.cpp b/src/gui/dialogs/qfiledialog.cpp
index 21650bb..089e04a 100644
--- a/src/gui/dialogs/qfiledialog.cpp
+++ b/src/gui/dialogs/qfiledialog.cpp
@@ -229,11 +229,10 @@ Q_GUI_EXPORT _qt_filedialog_save_filename_hook qt_filedialog_save_filename_hook
     \value ReadOnly Indicates that the model is readonly.
 
     \value HideNameFilterDetails Indicates if the is hidden or not.
-    This value is obsolete and does nothing since Qt 4.5:
 
     \value DontUseSheet In previous versions of Qt, the static
     functions would create a sheet by default if the static function
-    was given a parent. This is no longer supported in Qt 4.5, The
+    was given a parent. This is no longer supported and does nothing in Qt 4.5, The
     static functions will always be an application modal dialog. If
     you want to use sheets, use QFileDialog::open() instead.
 
diff --git a/src/gui/graphicsview/qgraphicsitem.cpp b/src/gui/graphicsview/qgraphicsitem.cpp
index ed36f87..b4e19d1 100644
--- a/src/gui/graphicsview/qgraphicsitem.cpp
+++ b/src/gui/graphicsview/qgraphicsitem.cpp
@@ -2569,6 +2569,7 @@ void QGraphicsItem::setOpacity(qreal opacity)
     if (newOpacity == d_ptr->opacity)
         return;
 
+    bool wasFullyTransparent = d_ptr->isOpacityNull();
     d_ptr->opacity = newOpacity;
 
     // Notify change.
@@ -2584,7 +2585,9 @@ void QGraphicsItem::setOpacity(qreal opacity)
         d_ptr->scene->d_func()->markDirty(this, QRectF(),
                                           /*invalidateChildren=*/true,
                                           /*force=*/false,
-                                          /*ignoreOpacity=*/true);
+                                          /*ignoreOpacity=*/d_ptr->isOpacityNull());
+        if (wasFullyTransparent)
+            d_ptr->paintedViewBoundingRectsNeedRepaint = 1;
     }
 
     if (d_ptr->isObject)
diff --git a/src/gui/graphicsview/qgraphicsitem_p.h b/src/gui/graphicsview/qgraphicsitem_p.h
index 5ad6cd5..b3ca3b5 100644
--- a/src/gui/graphicsview/qgraphicsitem_p.h
+++ b/src/gui/graphicsview/qgraphicsitem_p.h
@@ -358,14 +358,20 @@ public:
         return o;
     }
 
+    inline bool isOpacityNull() const
+    { return (opacity < qreal(0.001)); }
+
+    static inline bool isOpacityNull(qreal opacity)
+    { return (opacity < qreal(0.001)); }
+
     inline bool isFullyTransparent() const
     {
-        if (opacity < 0.001)
+        if (isOpacityNull())
             return true;
         if (!parent)
             return false;
 
-        return calcEffectiveOpacity() < 0.001;
+        return isOpacityNull(calcEffectiveOpacity());
     }
 
     inline qreal effectiveOpacity() const {
diff --git a/src/gui/graphicsview/qgraphicsscene.cpp b/src/gui/graphicsview/qgraphicsscene.cpp
index 54d47fa..66707fc 100644
--- a/src/gui/graphicsview/qgraphicsscene.cpp
+++ b/src/gui/graphicsview/qgraphicsscene.cpp
@@ -251,6 +251,7 @@
 #endif
 #include <private/qgraphicseffect_p.h>
 #include <private/qgesturemanager_p.h>
+#include <private/qpathclipper_p.h>
 
 // #define GESTURE_DEBUG
 #ifndef GESTURE_DEBUG
@@ -372,7 +373,10 @@ void QGraphicsScenePrivate::_q_emitUpdated()
             }
         }
     } else {
-        updateAll = false;
+        if (views.isEmpty()) {
+            updateAll = false;
+            return;
+        }
         for (int i = 0; i < views.size(); ++i)
             views.at(i)->d_func()->processPendingUpdates();
         // It's important that we update all views before we dispatch, hence two for-loops.
@@ -4603,6 +4607,7 @@ void QGraphicsScenePrivate::drawItems(QPainter *painter, const QTransform *const
     if (!unpolishedItems.isEmpty())
         _q_polishItems();
 
+    updateAll = false;
     QRectF exposedSceneRect;
     if (exposedRegion && indexMethod != QGraphicsScene::NoIndex) {
         exposedSceneRect = exposedRegion->boundingRect().adjusted(-1, -1, 1, 1);
@@ -4630,7 +4635,7 @@ void QGraphicsScenePrivate::drawSubtreeRecursive(QGraphicsItem *item, QPainter *
         return; // Item has neither contents nor children!(?)
 
     const qreal opacity = item->d_ptr->combineOpacityFromParent(parentOpacity);
-    const bool itemIsFullyTransparent = (opacity < 0.0001);
+    const bool itemIsFullyTransparent = QGraphicsItemPrivate::isOpacityNull(opacity);
     if (itemIsFullyTransparent && (!itemHasChildren || item->d_ptr->childrenCombineOpacity()))
         return;
 
@@ -4750,7 +4755,7 @@ void QGraphicsScenePrivate::draw(QGraphicsItem *item, QPainter *painter, const Q
                                  qreal opacity, const QTransform *effectTransform,
                                  bool wasDirtyParentSceneTransform, bool drawItem)
 {
-    const bool itemIsFullyTransparent = (opacity < 0.0001);
+    const bool itemIsFullyTransparent = QGraphicsItemPrivate::isOpacityNull(opacity);
     const bool itemClipsChildrenToShape = (item->d_ptr->flags & QGraphicsItem::ItemClipsChildrenToShape);
     const bool itemHasChildren = !item->d_ptr->children.isEmpty();
 
@@ -4765,7 +4770,12 @@ void QGraphicsScenePrivate::draw(QGraphicsItem *item, QPainter *painter, const Q
                 painter->setWorldTransform(*transformPtr * *effectTransform);
             else
                 painter->setWorldTransform(*transformPtr);
-            painter->setClipPath(item->shape(), Qt::IntersectClip);
+            QRectF clipRect;
+            const QPainterPath clipPath(item->shape());
+            if (QPathClipper::pathToRect(clipPath, &clipRect))
+                painter->setClipRect(clipRect, Qt::IntersectClip);
+            else
+                painter->setClipPath(clipPath, Qt::IntersectClip);
         }
 
         // Draw children behind
@@ -4801,8 +4811,14 @@ void QGraphicsScenePrivate::draw(QGraphicsItem *item, QPainter *painter, const Q
                 painter->setWorldTransform(*transformPtr);
         }
 
-        if (itemClipsToShape)
-            painter->setClipPath(item->shape(), Qt::IntersectClip);
+        if (itemClipsToShape) {
+            QRectF clipRect;
+            const QPainterPath clipPath(item->shape());
+            if (QPathClipper::pathToRect(clipPath, &clipRect))
+                painter->setClipRect(clipRect, Qt::IntersectClip);
+            else
+                painter->setClipPath(clipPath, Qt::IntersectClip);
+        }
         painter->setOpacity(opacity);
 
         if (!item->d_ptr->cacheMode && !item->d_ptr->isWidget)
@@ -4980,7 +4996,8 @@ void QGraphicsScenePrivate::processDirtyItemsRecursive(QGraphicsItem *item, bool
     }
 
     const qreal opacity = item->d_ptr->combineOpacityFromParent(parentOpacity);
-    const bool itemIsFullyTransparent = !item->d_ptr->ignoreOpacity && opacity < 0.0001;
+    const bool itemIsFullyTransparent = !item->d_ptr->ignoreOpacity
+                                        && QGraphicsItemPrivate::isOpacityNull(opacity);
     if (itemIsFullyTransparent && (!itemHasChildren || item->d_ptr->childrenCombineOpacity())) {
         resetDirtyItem(item, /*recursive=*/itemHasChildren);
         return;
@@ -5153,6 +5170,7 @@ void QGraphicsScene::drawItems(QPainter *painter,
     if (!d->unpolishedItems.isEmpty())
         d->_q_polishItems();
 
+    d->updateAll = false;
     QTransform viewTransform = painter->worldTransform();
     Q_UNUSED(options);
 
diff --git a/src/gui/graphicsview/qgraphicssceneindex.cpp b/src/gui/graphicsview/qgraphicssceneindex.cpp
index 043c4eb..707c71f 100644
--- a/src/gui/graphicsview/qgraphicssceneindex.cpp
+++ b/src/gui/graphicsview/qgraphicssceneindex.cpp
@@ -279,7 +279,7 @@ void QGraphicsSceneIndexPrivate::recursive_items_helper(QGraphicsItem *item, QRe
         return;
 
     const qreal opacity = item->d_ptr->combineOpacityFromParent(parentOpacity);
-    const bool itemIsFullyTransparent = (opacity < 0.0001);
+    const bool itemIsFullyTransparent = QGraphicsItemPrivate::isOpacityNull(opacity);
     const bool itemHasChildren = !item->d_ptr->children.isEmpty();
     if (itemIsFullyTransparent && (!itemHasChildren || item->d_ptr->childrenCombineOpacity()))
         return;
@@ -554,7 +554,7 @@ QList<QGraphicsItem *> QGraphicsSceneIndex::estimateTopLevelItems(const QRectF &
 
 /*!
     \fn QList<QGraphicsItem *> QGraphicsSceneIndex::items(Qt::SortOrder order = Qt::DescendingOrder) const
-    
+
     This pure virtual function all items in the index and sort them using
     \a order.
 */
diff --git a/src/gui/graphicsview/qgraphicsview.cpp b/src/gui/graphicsview/qgraphicsview.cpp
index 451f183..96b9373 100644
--- a/src/gui/graphicsview/qgraphicsview.cpp
+++ b/src/gui/graphicsview/qgraphicsview.cpp
@@ -2748,7 +2748,6 @@ bool QGraphicsView::viewportEvent(QEvent *event)
                     }
                 }
             }
-            d->scene->d_func()->updateAll = false;
         }
         break;
     case QEvent::TouchBegin:
diff --git a/src/gui/image/qimagepixmapcleanuphooks.cpp b/src/gui/image/qimagepixmapcleanuphooks.cpp
index 61d538f..ace4bb6 100644
--- a/src/gui/image/qimagepixmapcleanuphooks.cpp
+++ b/src/gui/image/qimagepixmapcleanuphooks.cpp
@@ -62,12 +62,12 @@ QImagePixmapCleanupHooks *QImagePixmapCleanupHooks::instance()
     return qt_image_and_pixmap_cleanup_hooks();
 }
 
-void QImagePixmapCleanupHooks::addPixmapModificationHook(_qt_pixmap_cleanup_hook_pm hook)
+void QImagePixmapCleanupHooks::addPixmapDataModificationHook(_qt_pixmap_cleanup_hook_pmd hook)
 {
     pixmapModificationHooks.append(hook);
 }
 
-void QImagePixmapCleanupHooks::addPixmapDestructionHook(_qt_pixmap_cleanup_hook_pm hook)
+void QImagePixmapCleanupHooks::addPixmapDataDestructionHook(_qt_pixmap_cleanup_hook_pmd hook)
 {
     pixmapDestructionHooks.append(hook);
 }
@@ -78,12 +78,12 @@ void QImagePixmapCleanupHooks::addImageHook(_qt_image_cleanup_hook_64 hook)
     imageHooks.append(hook);
 }
 
-void QImagePixmapCleanupHooks::removePixmapModificationHook(_qt_pixmap_cleanup_hook_pm hook)
+void QImagePixmapCleanupHooks::removePixmapDataModificationHook(_qt_pixmap_cleanup_hook_pmd hook)
 {
     pixmapModificationHooks.removeAll(hook);
 }
 
-void QImagePixmapCleanupHooks::removePixmapDestructionHook(_qt_pixmap_cleanup_hook_pm hook)
+void QImagePixmapCleanupHooks::removePixmapDataDestructionHook(_qt_pixmap_cleanup_hook_pmd hook)
 {
     pixmapDestructionHooks.removeAll(hook);
 }
@@ -93,24 +93,24 @@ void QImagePixmapCleanupHooks::removeImageHook(_qt_image_cleanup_hook_64 hook)
     imageHooks.removeAll(hook);
 }
 
-void QImagePixmapCleanupHooks::executePixmapModificationHooks(QPixmap* pm)
+void QImagePixmapCleanupHooks::executePixmapDataModificationHooks(QPixmapData* pmd)
 {
     QImagePixmapCleanupHooks *h = qt_image_and_pixmap_cleanup_hooks();
     for (int i = 0; i < h->pixmapModificationHooks.count(); ++i)
-        h->pixmapModificationHooks[i](pm);
+        h->pixmapModificationHooks[i](pmd);
 
     if (qt_pixmap_cleanup_hook_64)
-        qt_pixmap_cleanup_hook_64(pm->cacheKey());
+        qt_pixmap_cleanup_hook_64(pmd->cacheKey());
 }
 
-void QImagePixmapCleanupHooks::executePixmapDestructionHooks(QPixmap* pm)
+void QImagePixmapCleanupHooks::executePixmapDataDestructionHooks(QPixmapData* pmd)
 {
     QImagePixmapCleanupHooks *h = qt_image_and_pixmap_cleanup_hooks();
     for (int i = 0; i < h->pixmapDestructionHooks.count(); ++i)
-        h->pixmapDestructionHooks[i](pm);
+        h->pixmapDestructionHooks[i](pmd);
 
     if (qt_pixmap_cleanup_hook_64)
-        qt_pixmap_cleanup_hook_64(pm->cacheKey());
+        qt_pixmap_cleanup_hook_64(pmd->cacheKey());
 }
 
 void QImagePixmapCleanupHooks::executeImageHooks(qint64 key)
diff --git a/src/gui/image/qimagepixmapcleanuphooks_p.h b/src/gui/image/qimagepixmapcleanuphooks_p.h
index 7176044..88dd3a6 100644
--- a/src/gui/image/qimagepixmapcleanuphooks_p.h
+++ b/src/gui/image/qimagepixmapcleanuphooks_p.h
@@ -58,7 +58,8 @@
 QT_BEGIN_NAMESPACE
 
 typedef void (*_qt_image_cleanup_hook_64)(qint64);
-typedef void (*_qt_pixmap_cleanup_hook_pm)(QPixmap*);
+typedef void (*_qt_pixmap_cleanup_hook_pmd)(QPixmapData*);
+
 
 class QImagePixmapCleanupHooks;
 
@@ -71,27 +72,27 @@ public:
     static void enableCleanupHooks(const QPixmap &pixmap);
     static void enableCleanupHooks(QPixmapData *pixmapData);
 
-    // Gets called when a pixmap is about to be modified:
-    void addPixmapModificationHook(_qt_pixmap_cleanup_hook_pm);
+    // Gets called when a pixmap data is about to be modified:
+    void addPixmapDataModificationHook(_qt_pixmap_cleanup_hook_pmd);
 
-    // Gets called when a pixmap is about to be destroyed:
-    void addPixmapDestructionHook(_qt_pixmap_cleanup_hook_pm);
+    // Gets called when a pixmap data is about to be destroyed:
+    void addPixmapDataDestructionHook(_qt_pixmap_cleanup_hook_pmd);
 
     // Gets called when an image is about to be modified or destroyed:
     void addImageHook(_qt_image_cleanup_hook_64);
 
-    void removePixmapModificationHook(_qt_pixmap_cleanup_hook_pm);
-    void removePixmapDestructionHook(_qt_pixmap_cleanup_hook_pm);
+    void removePixmapDataModificationHook(_qt_pixmap_cleanup_hook_pmd);
+    void removePixmapDataDestructionHook(_qt_pixmap_cleanup_hook_pmd);
     void removeImageHook(_qt_image_cleanup_hook_64);
 
-    static void executePixmapModificationHooks(QPixmap*);
-    static void executePixmapDestructionHooks(QPixmap*);
+    static void executePixmapDataModificationHooks(QPixmapData*);
+    static void executePixmapDataDestructionHooks(QPixmapData*);
     static void executeImageHooks(qint64 key);
 
 private:
     QList<_qt_image_cleanup_hook_64> imageHooks;
-    QList<_qt_pixmap_cleanup_hook_pm> pixmapModificationHooks;
-    QList<_qt_pixmap_cleanup_hook_pm> pixmapDestructionHooks;
+    QList<_qt_pixmap_cleanup_hook_pmd> pixmapModificationHooks;
+    QList<_qt_pixmap_cleanup_hook_pmd> pixmapDestructionHooks;
 };
 
 QT_END_NAMESPACE
diff --git a/src/gui/image/qpixmap.cpp b/src/gui/image/qpixmap.cpp
index f823fdc..d1e5c40 100644
--- a/src/gui/image/qpixmap.cpp
+++ b/src/gui/image/qpixmap.cpp
@@ -320,8 +320,6 @@ QPixmap::QPixmap(const char * const xpm[])
 QPixmap::~QPixmap()
 {
     Q_ASSERT(!data || data->ref >= 1); // Catch if ref-counting changes again
-    if (data && data->is_cached && data->ref == 1) // ref will be decrememnted after destructor returns
-        QImagePixmapCleanupHooks::executePixmapDestructionHooks(this);
 }
 
 /*!
@@ -1025,12 +1023,8 @@ qint64 QPixmap::cacheKey() const
     if (isNull())
         return 0;
 
-    int classKey = data->classId();
-    if (classKey >= 1024)
-        classKey = -(classKey >> 10);
-    return ((((qint64) classKey) << 56)
-            | (((qint64) data->serialNumber()) << 32)
-            | ((qint64) (data->detach_no)));
+    Q_ASSERT(data);
+    return data->cacheKey();
 }
 
 static void sendResizeEvents(QWidget *target)
@@ -1943,7 +1937,7 @@ void QPixmap::detach()
     }
 
     if (data->is_cached && data->ref == 1)
-        QImagePixmapCleanupHooks::executePixmapModificationHooks(this);
+        QImagePixmapCleanupHooks::executePixmapDataModificationHooks(data.data());
 
 #if defined(Q_WS_MAC)
     QMacPixmapData *macData = id == QPixmapData::MacClass ? static_cast<QMacPixmapData*>(data.data()) : 0;
diff --git a/src/gui/image/qpixmap_x11.cpp b/src/gui/image/qpixmap_x11.cpp
index 0e66e09..e1e8a0d 100644
--- a/src/gui/image/qpixmap_x11.cpp
+++ b/src/gui/image/qpixmap_x11.cpp
@@ -68,6 +68,7 @@
 #include "qx11info_x11.h"
 #include <private/qdrawhelper_p.h>
 #include <private/qimage_p.h>
+#include <private/qimagepixmapcleanuphooks_p.h>
 
 #include <stdlib.h>
 
@@ -1228,6 +1229,12 @@ void QX11PixmapData::fill(const QColor &fillColor)
 
 QX11PixmapData::~QX11PixmapData()
 {
+    // Cleanup hooks have to be called before the handles are freed
+    if (is_cached) {
+        QImagePixmapCleanupHooks::executePixmapDataDestructionHooks(this);
+        is_cached = false;
+    }
+
     release();
 }
 
@@ -1236,8 +1243,13 @@ void QX11PixmapData::release()
     delete pengine;
     pengine = 0;
 
-    if (!X11)
+    if (!X11) {
+#ifndef QT_NO_DEBUG
+        qWarning("~QX11PixmapData(): QPixmap objects must be destroyed before the QApplication"
+                 " object, otherwise the native pixmap object will be leaked.");
+#endif
         return;
+    }
 
     if (x11_mask) {
 #ifndef QT_NO_XRENDER
diff --git a/src/gui/image/qpixmapdata.cpp b/src/gui/image/qpixmapdata.cpp
index 65032da..ea4fe6b 100644
--- a/src/gui/image/qpixmapdata.cpp
+++ b/src/gui/image/qpixmapdata.cpp
@@ -45,6 +45,7 @@
 #include <QtGui/qimagereader.h>
 #include <private/qgraphicssystem_p.h>
 #include <private/qapplication_p.h>
+#include <private/qimagepixmapcleanuphooks_p.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -80,6 +81,16 @@ QPixmapData::QPixmapData(PixelType pixelType, int objectId)
 
 QPixmapData::~QPixmapData()
 {
+    // Sometimes the pixmap cleanup hooks will be called from derrived classes, which will
+    // then set is_cached to false. For example, on X11 QtOpenGL needs to delete the GLXPixmap
+    // or EGL Pixmap Surface for a given pixmap _before_ the native X11 pixmap is deleted,
+    // otherwise some drivers will leak the GL surface. In this case, QX11PixmapData will
+    // call the cleanup hooks itself before deleting the native pixmap and set is_cached to
+    // false.
+    if (is_cached) {
+        QImagePixmapCleanupHooks::executePixmapDataDestructionHooks(this);
+        is_cached = false;
+    }
 }
 
 QPixmapData *QPixmapData::createCompatiblePixmapData() const
diff --git a/src/gui/image/qpixmapdata_p.h b/src/gui/image/qpixmapdata_p.h
index 1125515..827fa18 100644
--- a/src/gui/image/qpixmapdata_p.h
+++ b/src/gui/image/qpixmapdata_p.h
@@ -117,6 +117,14 @@ public:
     inline int colorCount() const { return metric(QPaintDevice::PdmNumColors); }
     inline int depth() const { return d; }
     inline bool isNull() const { return is_null; }
+    inline qint64 cacheKey() const {
+        int classKey = id;
+        if (classKey >= 1024)
+            classKey = -(classKey >> 10);
+        return ((((qint64) classKey) << 56)
+                | (((qint64) ser_no) << 32)
+                | ((qint64) detach_no));
+    }
 
 #if defined(Q_OS_SYMBIAN)
     virtual void* toNativeType(NativeType type);
diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp
index ffad38b..4520a1b 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -1439,7 +1439,16 @@ QWidget::~QWidget()
     }
 #endif
 
-    if (QWidgetBackingStore *bs = d->maybeBackingStore()) {
+    if (d->extra && d->extra->topextra && d->extra->topextra->backingStore) {
+        // Okay, we are about to destroy the top-level window that owns
+        // the backing store. Make sure we delete the backing store right away
+        // before the window handle is invalid. This is important because
+        // the backing store will delete its window surface, which may or may
+        // not have a reference to this widget that will be used later to
+        // notify the window it no longer has a surface.
+        delete d->extra->topextra->backingStore;
+        d->extra->topextra->backingStore = 0;
+    } else if (QWidgetBackingStore *bs = d->maybeBackingStore()) {
         bs->removeDirtyWidget(this);
         if (testAttribute(Qt::WA_StaticContents))
             bs->removeStaticWidget(this);
@@ -6414,6 +6423,8 @@ void QWidget::setTabOrder(QWidget* first, QWidget *second)
         first = fp;
     }
 
+    if (fp == second)
+        return;
 
     if (QWidget *sp = second->focusProxy())
         second = sp;
diff --git a/src/gui/kernel/qwidget_x11.cpp b/src/gui/kernel/qwidget_x11.cpp
index 4684bc1..007de7f 100644
--- a/src/gui/kernel/qwidget_x11.cpp
+++ b/src/gui/kernel/qwidget_x11.cpp
@@ -346,11 +346,6 @@ Q_GUI_EXPORT void qt_x11_enforce_cursor(QWidget * w)
     qt_x11_enforce_cursor(w, false);
 }
 
-static Bool checkForConfigureAndExpose(Display *, XEvent *e, XPointer)
-{
-    return e->type == ConfigureNotify || e->type == Expose;
-}
-
 Q_GUI_EXPORT void qt_x11_wait_for_window_manager(QWidget* w)
 {
     if (!w || (!w->isWindow() && !w->internalWinId()))
@@ -363,38 +358,58 @@ Q_GUI_EXPORT void qt_x11_wait_for_window_manager(QWidget* w)
     if (!w->testAttribute(Qt::WA_WState_Created))
         return;
 
-    if (!(w->windowFlags() & Qt::X11BypassWindowManagerHint)) {
-        // if the window is not override-redirect, then the window manager
-        // will reparent us to the frame decoration window.
-        while (!XCheckTypedWindowEvent(X11->display, w->effectiveWinId(), ReparentNotify, &ev)) {
-            if (t.elapsed() > maximumWaitTime)
-                return;
-            qApp->syncX(); // non-busy wait
-        }
-    }
+    // first deliver events that are already in the local queue
+    QApplication::sendPostedEvents();
 
-    while (!XCheckTypedWindowEvent(X11->display, w->effectiveWinId(), MapNotify, &ev)) {
-        if (t.elapsed() > maximumWaitTime)
-            return;
-        qApp->syncX(); // non-busy wait
-    }
+    // the normal sequence is:
+    //  ... ConfigureNotify ... ReparentNotify ... MapNotify ... Expose
+    // with X11BypassWindowManagerHint:
+    //  ConfigureNotify ... MapNotify ... Expose
 
-    qApp->x11ProcessEvent(&ev);
+    enum State {
+        Initial, Reparented, Mapped
+    } state = Initial;
 
-    // ok, seems like the window manager successfully reparented us, we'll wait
-    // for the first paint event to arrive, while handling ConfigureNotify in
-    // the arrival order
-    while(1)
-    {
-        if (XCheckIfEvent(X11->display, &ev, checkForConfigureAndExpose, 0)) {
+    do {
+        if (XEventsQueued(X11->display, QueuedAlready)) {
+            XNextEvent(X11->display, &ev);
             qApp->x11ProcessEvent(&ev);
-            if (ev.type == Expose)
-                return;
+
+            if (w->windowFlags() & Qt::X11BypassWindowManagerHint) {
+                switch (state) {
+                case Initial:
+                case Reparented:
+                    if (ev.type == MapNotify)
+                        state = Mapped;
+                    break;
+                case Mapped:
+                    if (ev.type == Expose)
+                        return;
+                    break;
+                }
+            } else {
+                switch (state) {
+                case Initial:
+                    if (ev.type == ReparentNotify)
+                        state = Reparented;
+                    break;
+                case Reparented:
+                    if (ev.type == MapNotify)
+                        state = Mapped;
+                    break;
+                case Mapped:
+                    if (ev.type == Expose)
+                        return;
+                    break;
+                }
+            }
+        } else {
+            if (!XEventsQueued(X11->display, QueuedAfterFlush))
+                qApp->syncX(); // non-busy wait
         }
         if (t.elapsed() > maximumWaitTime)
             return;
-        qApp->syncX(); // non-busy wait
-    }
+    } while(1);
 }
 
 void qt_change_net_wm_state(const QWidget* w, bool set, Atom one, Atom two = 0)
diff --git a/src/gui/painting/qpainter.cpp b/src/gui/painting/qpainter.cpp
index cde6a2d..bf12c6b 100644
--- a/src/gui/painting/qpainter.cpp
+++ b/src/gui/painting/qpainter.cpp
@@ -7509,7 +7509,7 @@ QPaintDevice *QPainter::redirected(const QPaintDevice *device, QPoint *offset)
             return widgetPrivate->redirected(offset);
     }
 
-    if (*globalRedirectionAtomic() == 0)
+    if (!globalRedirectionAtomic() || *globalRedirectionAtomic() == 0)
         return 0;
 
     QMutexLocker locker(globalRedirectionsMutex());
@@ -7529,7 +7529,7 @@ QPaintDevice *QPainter::redirected(const QPaintDevice *device, QPoint *offset)
 
 void qt_painter_removePaintDevice(QPaintDevice *dev)
 {
-    if (*globalRedirectionAtomic() == 0)
+    if (!globalRedirectionAtomic() || *globalRedirectionAtomic() == 0)
         return;
 
     QMutex *mutex = 0;
diff --git a/src/gui/painting/qpathclipper.cpp b/src/gui/painting/qpathclipper.cpp
index 7997e77..bc81514 100644
--- a/src/gui/painting/qpathclipper.cpp
+++ b/src/gui/painting/qpathclipper.cpp
@@ -90,8 +90,6 @@ static QPointF normalize(const QPointF &p)
     return p / qSqrt(p.x() * p.x() + p.y() * p.y());
 }
 
-static bool pathToRect(const QPainterPath &path, QRectF *rect = 0);
-
 struct QIntersection
 {
     qreal alphaA;
@@ -1660,7 +1658,7 @@ static bool fuzzyCompare(qreal a, qreal b)
     return qFuzzyCompare(a, b);
 }
 
-static bool pathToRect(const QPainterPath &path, QRectF *rect)
+bool QPathClipper::pathToRect(const QPainterPath &path, QRectF *rect)
 {
     if (path.elementCount() != 5)
         return false;
@@ -1693,7 +1691,7 @@ static bool pathToRect(const QPainterPath &path, QRectF *rect)
         return false;
 
     if (rect)
-        *rect = QRectF(QPointF(x1, y1), QPointF(x2, y2));
+        rect->setCoords(x1, y1, x2, y2);
 
     return true;
 }
diff --git a/src/gui/painting/qpathclipper_p.h b/src/gui/painting/qpathclipper_p.h
index 0d2c049..b900862 100644
--- a/src/gui/painting/qpathclipper_p.h
+++ b/src/gui/painting/qpathclipper_p.h
@@ -86,6 +86,8 @@ public:
     bool intersect();
     bool contains();
 
+    static bool pathToRect(const QPainterPath &path, QRectF *rect = 0);
+
 private:
     Q_DISABLE_COPY(QPathClipper)
 
diff --git a/src/gui/styles/qstylesheetstyle.cpp b/src/gui/styles/qstylesheetstyle.cpp
index 498313b..b36294a 100644
--- a/src/gui/styles/qstylesheetstyle.cpp
+++ b/src/gui/styles/qstylesheetstyle.cpp
@@ -1125,6 +1125,7 @@ void QRenderRule::fixupBorder(int nativeWidth)
 
 void QRenderRule::drawBorderImage(QPainter *p, const QRect& rect)
 {
+    setClip(p, rect);
     static const Qt::TileRule tileMode2TileRule[] = {
         Qt::StretchTile, Qt::RoundTile, Qt::StretchTile, Qt::RepeatTile, Qt::StretchTile };
 
@@ -1142,6 +1143,7 @@ void QRenderRule::drawBorderImage(QPainter *p, const QRect& rect)
                       QRect(QPoint(), borderImageData->pixmap.size()), sourceMargins,
                       QTileRules(tileMode2TileRule[borderImageData->horizStretch], tileMode2TileRule[borderImageData->vertStretch]));
     p->setRenderHint(QPainter::SmoothPixmapTransform, wasSmoothPixmapTransform);
+    unsetClip(p);
 }
 
 QRect QRenderRule::originRect(const QRect &rect, Origin origin) const
diff --git a/src/gui/text/qzip.cpp b/src/gui/text/qzip.cpp
index 2fc1940..d30c996 100644
--- a/src/gui/text/qzip.cpp
+++ b/src/gui/text/qzip.cpp
@@ -54,10 +54,13 @@
 #include <zlib.h>
 
 #if defined(Q_OS_WIN)
-#undef S_IFREG
-#define S_IFREG 0100000
+#  undef S_IFREG
+#  define S_IFREG 0100000
+#  ifndef S_IFDIR
+#    define S_IFDIR 0040000
+#  endif
 #  ifndef S_ISDIR
-#    define S_ISDIR(x) ((x) & 0040000) > 0
+#    define S_ISDIR(x) ((x) & S_IFDIR) > 0
 #  endif
 #  ifndef S_ISREG
 #    define S_ISREG(x) ((x) & 0170000) == S_IFREG
diff --git a/src/gui/text/qzipreader_p.h b/src/gui/text/qzipreader_p.h
index 1086464..67a2ace 100644
--- a/src/gui/text/qzipreader_p.h
+++ b/src/gui/text/qzipreader_p.h
@@ -49,7 +49,7 @@
 //  -------------
 //
 // This file is not part of the Qt API.  It exists for the convenience
-// of the QLibrary class.  This header file may change from
+// of the QZipReader class.  This header file may change from
 // version to version without notice, or even be removed.
 //
 // We mean it.
diff --git a/src/gui/text/qzipwriter_p.h b/src/gui/text/qzipwriter_p.h
index 7b97937..9322f4a 100644
--- a/src/gui/text/qzipwriter_p.h
+++ b/src/gui/text/qzipwriter_p.h
@@ -47,7 +47,7 @@
 //  -------------
 //
 // This file is not part of the Qt API.  It exists for the convenience
-// of the QLibrary class.  This header file may change from
+// of the QZipWriter class.  This header file may change from
 // version to version without notice, or even be removed.
 //
 // We mean it.
diff --git a/src/gui/widgets/qabstractscrollarea.cpp b/src/gui/widgets/qabstractscrollarea.cpp
index 87f6c83..1d496d5 100644
--- a/src/gui/widgets/qabstractscrollarea.cpp
+++ b/src/gui/widgets/qabstractscrollarea.cpp
@@ -1134,13 +1134,10 @@ void QAbstractScrollArea::mouseMoveEvent(QMouseEvent *e)
 void QAbstractScrollArea::wheelEvent(QWheelEvent *e)
 {
     Q_D(QAbstractScrollArea);
-    QScrollBar *const bars[2] = { d->hbar, d->vbar };
-    int idx = (e->orientation() == Qt::Vertical) ? 1 : 0;
-    int other = (idx + 1) % 2;
-    if (!bars[idx]->isVisible() && bars[other]->isVisible())
-        idx = other;   // If the scrollbar of the event orientation is hidden, fallback to the other.
-
-    QApplication::sendEvent(bars[idx], e);
+    if (static_cast<QWheelEvent*>(e)->orientation() == Qt::Horizontal)
+        QApplication::sendEvent(d->hbar, e);
+    else
+        QApplication::sendEvent(d->vbar, e);
 }
 #endif
 
diff --git a/src/gui/widgets/qabstractslider.cpp b/src/gui/widgets/qabstractslider.cpp
index 2874647..defebb9 100644
--- a/src/gui/widgets/qabstractslider.cpp
+++ b/src/gui/widgets/qabstractslider.cpp
@@ -214,8 +214,8 @@ QT_BEGIN_NAMESPACE
 */
 
 QAbstractSliderPrivate::QAbstractSliderPrivate()
-    : minimum(0), maximum(99), singleStep(1), pageStep(10),
-      value(0), position(0), pressValue(-1), offset_accumulated(0), tracking(true),
+    : minimum(0), maximum(99), pageStep(10), value(0), position(0), pressValue(-1),
+      singleStep(1), offset_accumulated(0), tracking(true),
       blocktracking(false), pressed(false),
       invertedAppearance(false), invertedControls(false),
       orientation(Qt::Horizontal), repeatAction(QAbstractSlider::SliderNoAction)
diff --git a/src/gui/widgets/qmainwindowlayout.cpp b/src/gui/widgets/qmainwindowlayout.cpp
index d1e7285..fc75c92 100644
--- a/src/gui/widgets/qmainwindowlayout.cpp
+++ b/src/gui/widgets/qmainwindowlayout.cpp
@@ -1627,6 +1627,13 @@ void QMainWindowLayout::animationFinished(QWidget *widget)
             tb->d_func()->plug(currentGapRect);
 #endif
 
+        savedState.clear();
+        currentGapPos.clear();
+        pluggingWidget = 0;
+        //applying the state will make sure that the currentGap is updated correctly
+        //and all the geometries (especially the one from the central widget) is correct
+        layoutState.apply(false);
+
 #ifndef QT_NO_DOCKWIDGET
 #ifndef QT_NO_TABBAR
         if (qobject_cast<QDockWidget*>(widget) != 0) {
@@ -1637,13 +1644,6 @@ void QMainWindowLayout::animationFinished(QWidget *widget)
         }
 #endif
 #endif
-
-        savedState.clear();
-        currentGapPos.clear();
-        pluggingWidget = 0;
-        //applying the state will make sure that the currentGap is updated correctly
-        //and all the geometries (especially the one from the central widget) is correct
-        layoutState.apply(false);
     }
 
     if (!widgetAnimator.animating()) {
diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
index b282676..07f3159 100644
--- a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
+++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
@@ -558,6 +558,12 @@ void QGL2PaintEngineExPrivate::resetGLState()
     glStencilMask(0xff);
     glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
     glStencilFunc(GL_ALWAYS, 0, 0xff);
+    glDisableVertexAttribArray(QT_TEXTURE_COORDS_ATTR);
+    glDisableVertexAttribArray(QT_VERTEX_COORDS_ATTR);
+    glDisableVertexAttribArray(QT_OPACITY_ATTR);
+#ifndef QT_OPENGL_ES_2
+    glColor4f(1.0f, 1.0f, 1.0f, 1.0f); // color may have been changed by glVertexAttrib()
+#endif
 }
 
 void QGL2PaintEngineEx::endNativePainting()
diff --git a/src/opengl/qgl.cpp b/src/opengl/qgl.cpp
index 2a60708..fce9fdb 100644
--- a/src/opengl/qgl.cpp
+++ b/src/opengl/qgl.cpp
@@ -1590,10 +1590,8 @@ QGLTextureCache::QGLTextureCache()
     Q_ASSERT(qt_gl_texture_cache == 0);
     qt_gl_texture_cache = this;
 
-    QImagePixmapCleanupHooks::instance()->addPixmapModificationHook(cleanupTextures);
-#ifdef Q_WS_X11
-    QImagePixmapCleanupHooks::instance()->addPixmapDestructionHook(cleanupPixmapSurfaces);
-#endif
+    QImagePixmapCleanupHooks::instance()->addPixmapDataModificationHook(cleanupTextures);
+    QImagePixmapCleanupHooks::instance()->addPixmapDataDestructionHook(cleanupBeforePixmapDestruction);
     QImagePixmapCleanupHooks::instance()->addImageHook(imageCleanupHook);
 }
 
@@ -1601,10 +1599,8 @@ QGLTextureCache::~QGLTextureCache()
 {
     qt_gl_texture_cache = 0;
 
-    QImagePixmapCleanupHooks::instance()->removePixmapModificationHook(cleanupTextures);
-#ifdef Q_WS_X11
-    QImagePixmapCleanupHooks::instance()->removePixmapDestructionHook(cleanupPixmapSurfaces);
-#endif
+    QImagePixmapCleanupHooks::instance()->removePixmapDataModificationHook(cleanupTextures);
+    QImagePixmapCleanupHooks::instance()->removePixmapDataDestructionHook(cleanupBeforePixmapDestruction);
     QImagePixmapCleanupHooks::instance()->removeImageHook(imageCleanupHook);
 }
 
@@ -1672,30 +1668,29 @@ void QGLTextureCache::imageCleanupHook(qint64 cacheKey)
 }
 
 
-void QGLTextureCache::cleanupTextures(QPixmap* pixmap)
+void QGLTextureCache::cleanupTextures(QPixmapData* pmd)
 {
     // ### remove when the GL texture cache becomes thread-safe
     if (qApp->thread() == QThread::currentThread()) {
-        const qint64 cacheKey = pixmap->cacheKey();
+        const qint64 cacheKey = pmd->cacheKey();
         QGLTexture *texture = instance()->getTexture(cacheKey);
         if (texture && texture->options & QGLContext::MemoryManagedBindOption)
             instance()->remove(cacheKey);
     }
 }
 
-#if defined(Q_WS_X11)
-void QGLTextureCache::cleanupPixmapSurfaces(QPixmap* pixmap)
+void QGLTextureCache::cleanupBeforePixmapDestruction(QPixmapData* pmd)
 {
     // Remove any bound textures first:
-    cleanupTextures(pixmap);
+    cleanupTextures(pmd);
 
-    QPixmapData *pd = pixmap->data_ptr().data();
-    if (pd->classId() == QPixmapData::X11Class) {
-        Q_ASSERT(pd->ref == 1); // Make sure reference counting isn't broken
-        QGLContextPrivate::destroyGlSurfaceForPixmap(pd);
+#if defined(Q_WS_X11)
+    if (pmd->classId() == QPixmapData::X11Class) {
+        Q_ASSERT(pmd->ref == 0); // Make sure reference counting isn't broken
+        QGLContextPrivate::destroyGlSurfaceForPixmap(pmd);
     }
-}
 #endif
+}
 
 void QGLTextureCache::deleteIfEmpty()
 {
diff --git a/src/opengl/qgl_p.h b/src/opengl/qgl_p.h
index 0104f07..713b067 100644
--- a/src/opengl/qgl_p.h
+++ b/src/opengl/qgl_p.h
@@ -522,7 +522,7 @@ public:
     QSize bindCompressedTexturePVR(const char *buf, int len);
 };
 
-class QGLTextureCache {
+class Q_AUTOTEST_EXPORT QGLTextureCache {
 public:
     QGLTextureCache();
     ~QGLTextureCache();
@@ -539,11 +539,8 @@ public:
     static QGLTextureCache *instance();
     static void deleteIfEmpty();
     static void imageCleanupHook(qint64 cacheKey);
-    static void cleanupTextures(QPixmap* pixmap);
-#ifdef Q_WS_X11
-    // X11 needs to catch pixmap data destruction to delete EGL/GLX pixmap surfaces
-    static void cleanupPixmapSurfaces(QPixmap* pixmap);
-#endif
+    static void cleanupTextures(QPixmapData* pixmap);
+    static void cleanupBeforePixmapDestruction(QPixmapData* pixmap);
 
 private:
     QCache<qint64, QGLTexture> m_cache;
diff --git a/src/opengl/qglpixmapfilter.cpp b/src/opengl/qglpixmapfilter.cpp
index 11011ee..37bb7c0 100644
--- a/src/opengl/qglpixmapfilter.cpp
+++ b/src/opengl/qglpixmapfilter.cpp
@@ -319,14 +319,14 @@ public:
     ~QGLBlurTextureCache();
 
     QGLBlurTextureInfo *takeBlurTextureInfo(const QPixmap &pixmap);
-    bool hasBlurTextureInfo(const QPixmap &pixmap) const;
+    bool hasBlurTextureInfo(quint64 cacheKey) const;
     void insertBlurTextureInfo(const QPixmap &pixmap, QGLBlurTextureInfo *info);
-    void clearBlurTextureInfo(const QPixmap &pixmap);
+    void clearBlurTextureInfo(quint64 cacheKey);
 
     void timerEvent(QTimerEvent *event);
 
 private:
-    static void pixmapDestroyed(QPixmap *pixmap);
+    static void pixmapDestroyed(QPixmapData *pixmap);
 
     QCache<quint64, QGLBlurTextureInfo > cache;
 
@@ -379,21 +379,21 @@ QGLBlurTextureInfo *QGLBlurTextureCache::takeBlurTextureInfo(const QPixmap &pixm
     return cache.take(pixmap.cacheKey());
 }
 
-void QGLBlurTextureCache::clearBlurTextureInfo(const QPixmap &pixmap)
+void QGLBlurTextureCache::clearBlurTextureInfo(quint64 cacheKey)
 {
-    cache.remove(pixmap.cacheKey());
+    cache.remove(cacheKey);
 }
 
-bool QGLBlurTextureCache::hasBlurTextureInfo(const QPixmap &pixmap) const
+bool QGLBlurTextureCache::hasBlurTextureInfo(quint64 cacheKey) const
 {
-    return cache.contains(pixmap.cacheKey());
+    return cache.contains(cacheKey);
 }
 
 void QGLBlurTextureCache::insertBlurTextureInfo(const QPixmap &pixmap, QGLBlurTextureInfo *info)
 {
     static bool hookAdded = false;
     if (!hookAdded) {
-        QImagePixmapCleanupHooks::instance()->addPixmapDestructionHook(pixmapDestroyed);
+        QImagePixmapCleanupHooks::instance()->addPixmapDataDestructionHook(pixmapDestroyed);
         hookAdded = true;
     }
 
@@ -406,11 +406,11 @@ void QGLBlurTextureCache::insertBlurTextureInfo(const QPixmap &pixmap, QGLBlurTe
     timerId = startTimer(8000);
 }
 
-void QGLBlurTextureCache::pixmapDestroyed(QPixmap *pixmap)
+void QGLBlurTextureCache::pixmapDestroyed(QPixmapData *pmd)
 {
     foreach (QGLBlurTextureCache *cache, blurTextureCaches) {
-        if (cache->hasBlurTextureInfo(*pixmap))
-            cache->clearBlurTextureInfo(*pixmap);
+        if (cache->hasBlurTextureInfo(pmd->cacheKey()))
+            cache->clearBlurTextureInfo(pmd->cacheKey());
     }
 }
 
diff --git a/src/openvg/qpaintengine_vg.cpp b/src/openvg/qpaintengine_vg.cpp
index cc9ba77..6813d2f 100644
--- a/src/openvg/qpaintengine_vg.cpp
+++ b/src/openvg/qpaintengine_vg.cpp
@@ -188,6 +188,7 @@ public:
 
     bool maskValid;         // True if vgMask() contains valid data.
     bool maskIsSet;         // True if mask would be fully set if it was valid.
+    bool scissorMask;       // True if scissor is used in place of the mask.
     bool rawVG;             // True if processing a raw VG escape.
 
     QRect maskRect;         // Rectangle version of mask if it is simple.
@@ -355,6 +356,7 @@ void QVGPaintEnginePrivate::init()
 
     maskValid = false;
     maskIsSet = false;
+    scissorMask = false;
     rawVG = false;
 
     scissorActive = false;
@@ -1542,7 +1544,28 @@ void QVGPaintEngine::stroke(const QVectorPath &path, const QPen &pen)
 static inline bool clipTransformIsSimple(const QTransform& transform)
 {
     QTransform::TransformationType type = transform.type();
-    return (type == QTransform::TxNone || type == QTransform::TxTranslate);
+    if (type == QTransform::TxNone || type == QTransform::TxTranslate)
+        return true;
+    if (type == QTransform::TxRotate) {
+        // Check for 0, 90, 180, and 270 degree rotations.
+        // (0 might happen after 4 rotations of 90 degrees).
+        qreal m11 = transform.m11();
+        qreal m12 = transform.m12();
+        qreal m21 = transform.m21();
+        qreal m22 = transform.m22();
+        if (m11 == 0.0f && m22 == 0.0f) {
+            if (m12 == 1.0f && m21 == -1.0f)
+                return true;    // 90 degrees.
+            else if (m12 == -1.0f && m21 == 1.0f)
+                return true;    // 270 degrees.
+        } else if (m12 == 0.0f && m21 == 0.0f) {
+            if (m11 == -1.0f && m22 == -1.0f)
+                return true;    // 180 degrees.
+            else if (m11 == 1.0f && m22 == 1.0f)
+                return true;    // 0 degrees.
+        }
+    }
+    return false;
 }
 
 #if defined(QVG_SCISSOR_CLIP)
@@ -1664,12 +1687,12 @@ void QVGPaintEngine::clip(const QVectorPath &path, Qt::ClipOperation op)
     if (op == Qt::NoClip) {
         d->maskValid = false;
         d->maskIsSet = true;
+        d->scissorMask = false;
         d->maskRect = QRect();
         vgSeti(VG_MASKING, VG_FALSE);
         return;
     }
 
-#if defined(QVG_NO_RENDER_TO_MASK)
     // We don't have vgRenderToMask(), so handle simple QRectF's only.
     if (path.shape() == QVectorPath::RectangleHint &&
             path.elementCount() == 4 && clipTransformIsSimple(d->transform)) {
@@ -1679,8 +1702,10 @@ void QVGPaintEngine::clip(const QVectorPath &path, Qt::ClipOperation op)
         QRectF rect(points[0], points[1], points[2] - points[0],
                     points[5] - points[1]);
         clip(rect.toRect(), op);
+        return;
     }
-#else
+
+#if !defined(QVG_NO_RENDER_TO_MASK)
     QPaintDevice *pdev = paintDevice();
     int width = pdev->width();
     int height = pdev->height();
@@ -1711,6 +1736,7 @@ void QVGPaintEngine::clip(const QVectorPath &path, Qt::ClipOperation op)
     vgSeti(VG_MASKING, VG_TRUE);
     d->maskValid = true;
     d->maskIsSet = false;
+    d->scissorMask = false;
 #endif
 }
 
@@ -1731,6 +1757,7 @@ void QVGPaintEngine::clip(const QRect &rect, Qt::ClipOperation op)
         {
             d->maskValid = false;
             d->maskIsSet = true;
+            d->scissorMask = false;
             d->maskRect = QRect();
             vgSeti(VG_MASKING, VG_FALSE);
         }
@@ -1746,6 +1773,7 @@ void QVGPaintEngine::clip(const QRect &rect, Qt::ClipOperation op)
                     vgSeti(VG_MASKING, VG_FALSE);
                 d->maskValid = false;
                 d->maskIsSet = true;
+                d->scissorMask = false;
                 d->maskRect = QRect();
             } else {
                 // Special case: if the intersection of the system
@@ -1763,6 +1791,7 @@ void QVGPaintEngine::clip(const QRect &rect, Qt::ClipOperation op)
                     if (clip.rectCount() != 1) {
                         d->maskValid = false;
                         d->maskIsSet = false;
+                        d->scissorMask = false;
                         d->maskRect = QRect();
                         d->modifyMask(this, VG_FILL_MASK, r);
                         break;
@@ -1771,6 +1800,7 @@ void QVGPaintEngine::clip(const QRect &rect, Qt::ClipOperation op)
                 }
                 d->maskValid = false;
                 d->maskIsSet = false;
+                d->scissorMask = true;
                 d->maskRect = clipRect;
                 vgSeti(VG_MASKING, VG_FALSE);
                 updateScissor();
@@ -1781,13 +1811,30 @@ void QVGPaintEngine::clip(const QRect &rect, Qt::ClipOperation op)
         case Qt::IntersectClip:
         {
             QRect r = d->transform.mapRect(rect);
-            if (d->maskIsSet && isDefaultClipRect(r)) {
+            if (!d->maskValid) {
+                // Mask has not been used yet, so intersect with
+                // the previous scissor-based region in maskRect.
+                if (d->scissorMask)
+                    r = r.intersect(d->maskRect);
+                if (isDefaultClipRect(r)) {
+                    // The clip is the full window, so turn off clipping.
+                    d->maskIsSet = true;
+                    d->maskRect = QRect();
+                } else {
+                    // Activate the scissor on a smaller maskRect.
+                    d->maskIsSet = false;
+                    d->maskRect = r;
+                }
+                d->scissorMask = true;
+                updateScissor();
+            } else if (d->maskIsSet && isDefaultClipRect(r)) {
                 // Intersecting a full-window clip with a full-window
                 // region is the same as turning off clipping.
                 if (d->maskValid)
                     vgSeti(VG_MASKING, VG_FALSE);
                 d->maskValid = false;
                 d->maskIsSet = true;
+                d->scissorMask = false;
                 d->maskRect = QRect();
             } else {
                 d->modifyMask(this, VG_INTERSECT_MASK, r);
@@ -1829,6 +1876,7 @@ void QVGPaintEngine::clip(const QRegion &region, Qt::ClipOperation op)
         {
             d->maskValid = false;
             d->maskIsSet = true;
+            d->scissorMask = false;
             d->maskRect = QRect();
             vgSeti(VG_MASKING, VG_FALSE);
         }
@@ -1844,6 +1892,7 @@ void QVGPaintEngine::clip(const QRegion &region, Qt::ClipOperation op)
                     vgSeti(VG_MASKING, VG_FALSE);
                 d->maskValid = false;
                 d->maskIsSet = true;
+                d->scissorMask = false;
                 d->maskRect = QRect();
             } else {
                 // Special case: if the intersection of the system
@@ -1857,12 +1906,14 @@ void QVGPaintEngine::clip(const QRegion &region, Qt::ClipOperation op)
                 if (clip.rectCount() == 1) {
                     d->maskValid = false;
                     d->maskIsSet = false;
+                    d->scissorMask = true;
                     d->maskRect = clip.boundingRect();
                     vgSeti(VG_MASKING, VG_FALSE);
                     updateScissor();
                 } else {
                     d->maskValid = false;
                     d->maskIsSet = false;
+                    d->scissorMask = false;
                     d->maskRect = QRect();
                     d->modifyMask(this, VG_FILL_MASK, r);
                 }
@@ -1887,6 +1938,7 @@ void QVGPaintEngine::clip(const QRegion &region, Qt::ClipOperation op)
                     vgSeti(VG_MASKING, VG_FALSE);
                 d->maskValid = false;
                 d->maskIsSet = true;
+                d->scissorMask = false;
                 d->maskRect = QRect();
             } else {
                 d->modifyMask(this, VG_INTERSECT_MASK, r);
@@ -1965,6 +2017,7 @@ void QVGPaintEngine::clip(const QPainterPath &path, Qt::ClipOperation op)
     if (op == Qt::NoClip) {
         d->maskValid = false;
         d->maskIsSet = true;
+        d->scissorMask = false;
         d->maskRect = QRect();
         vgSeti(VG_MASKING, VG_FALSE);
         return;
@@ -2000,6 +2053,7 @@ void QVGPaintEngine::clip(const QPainterPath &path, Qt::ClipOperation op)
     vgSeti(VG_MASKING, VG_TRUE);
     d->maskValid = true;
     d->maskIsSet = false;
+    d->scissorMask = false;
 #else
     QPaintEngineEx::clip(path, op);
 #endif
@@ -2043,6 +2097,7 @@ void QVGPaintEnginePrivate::modifyMask
     vgSeti(VG_MASKING, VG_TRUE);
     maskValid = true;
     maskIsSet = false;
+    scissorMask = false;
 }
 
 void QVGPaintEnginePrivate::modifyMask
@@ -2064,6 +2119,7 @@ void QVGPaintEnginePrivate::modifyMask
     vgSeti(VG_MASKING, VG_TRUE);
     maskValid = true;
     maskIsSet = false;
+    scissorMask = false;
 }
 
 #endif // !QVG_SCISSOR_CLIP
@@ -2096,7 +2152,7 @@ void QVGPaintEngine::updateScissor()
     {
 #if !defined(QVG_SCISSOR_CLIP)
         // Combine the system clip with the simple mask rectangle.
-        if (!d->maskRect.isNull()) {
+        if (d->scissorMask) {
             if (region.isEmpty())
                 region = d->maskRect;
             else
@@ -2187,6 +2243,7 @@ void QVGPaintEngine::clipEnabledChanged()
         // Replay the entire clip stack to put the mask into the right state.
         d->maskValid = false;
         d->maskIsSet = true;
+        d->scissorMask = false;
         d->maskRect = QRect();
         s->clipRegion = defaultClipRegion();
         d->replayClipOperations();
@@ -2196,6 +2253,7 @@ void QVGPaintEngine::clipEnabledChanged()
         vgSeti(VG_MASKING, VG_FALSE);
         d->maskValid = false;
         d->maskIsSet = false;
+        d->scissorMask = false;
         d->maskRect = QRect();
     }
 #endif
@@ -2314,12 +2372,7 @@ bool QVGPaintEngine::clearRect(const QRectF &rect, const QColor &color)
     Q_D(QVGPaintEngine);
     QVGPainterState *s = state();
     if (!s->clipEnabled || s->clipOperation == Qt::NoClip) {
-        // The transform will either be identity or a simple translation,
-        // so do a simpler version of "r = d->transform.map(rect).toRect()".
-        QRect r = QRect(qRound(rect.x() + d->transform.dx()),
-                        qRound(rect.y() + d->transform.dy()),
-                        qRound(rect.width()),
-                        qRound(rect.height()));
+        QRect r = d->transform.mapRect(rect).toRect();
         int height = paintDevice()->height();
         if (d->clearColor != color || d->clearOpacity != s->opacity) {
             VGfloat values[4];
@@ -3398,6 +3451,7 @@ void QVGPaintEngine::restoreState(QPaintEngine::DirtyFlags dirty)
                   QPaintEngine::DirtyClipEnabled)) != 0) {
         d->maskValid = false;
         d->maskIsSet = false;
+        d->scissorMask = false;
         d->maskRect = QRect();
         clipEnabledChanged();
     }
diff --git a/src/plugins/gfxdrivers/directfb/qdirectfbscreen.cpp b/src/plugins/gfxdrivers/directfb/qdirectfbscreen.cpp
index 6b251c7..cd4d5c2 100644
--- a/src/plugins/gfxdrivers/directfb/qdirectfbscreen.cpp
+++ b/src/plugins/gfxdrivers/directfb/qdirectfbscreen.cpp
@@ -921,7 +921,7 @@ void QDirectFBScreenPrivate::setFlipFlags(const QStringList &args)
                          qPrintable(flip));
         }
     } else {
-        flipFlags = DSFLIP_BLIT;
+        flipFlags = DSFLIP_BLIT|DSFLIP_ONSYNC;
     }
 }
 
diff --git a/src/plugins/imageformats/gif/qgifhandler.cpp b/src/plugins/imageformats/gif/qgifhandler.cpp
index 6f049be..6d473e3 100644
--- a/src/plugins/imageformats/gif/qgifhandler.cpp
+++ b/src/plugins/imageformats/gif/qgifhandler.cpp
@@ -71,7 +71,8 @@ public:
     ~QGIFFormat();
 
     int decode(QImage *image, const uchar* buffer, int length,
-               int *nextFrameDelay, int *loopCount, QSize *nextSize);
+               int *nextFrameDelay, int *loopCount);
+    static void scan(QIODevice *device, QVector<QSize> *imageSizes);
 
     bool newFrame;
     bool partialNewFrame;
@@ -229,7 +230,7 @@ void QGIFFormat::disposePrevious(QImage *image)
     Returns the number of bytes consumed.
 */
 int QGIFFormat::decode(QImage *image, const uchar *buffer, int length,
-                       int *nextFrameDelay, int *loopCount, QSize *nextSize)
+                       int *nextFrameDelay, int *loopCount)
 {
     // We are required to state that
     //    "The Graphics Interchange Format(c) is the Copyright property of
@@ -346,10 +347,6 @@ int QGIFFormat::decode(QImage *image, const uchar *buffer, int length,
                     bpl = image->bytesPerLine();
                     bits = image->bits();
                     memset(bits, 0, image->byteCount());
-
-                    // ### size of the upcoming frame, should rather
-                    // be known before decoding it.
-                    *nextSize = QSize(swidth, sheight);
                 }
 
                 disposePrevious(image);
@@ -645,6 +642,255 @@ int QGIFFormat::decode(QImage *image, const uchar *buffer, int length,
     return initial-length;
 }
 
+/*!
+   Scans through the data stream defined by \a device and returns the image
+   sizes found in the stream in the \a imageSizes vector.
+*/
+void QGIFFormat::scan(QIODevice *device, QVector<QSize> *imageSizes)
+{
+    if (!device)
+        return;
+
+    qint64 oldPos = device->pos();
+    if (!device->seek(0))
+        return;
+
+    int colorCount = 0;
+    int localColorCount = 0;
+    int globalColorCount = 0;
+    int colorReadCount = 0;
+    bool localColormap = false;
+    bool globalColormap = false;
+    int count = 0;
+    int blockSize = 0;
+    int imageWidth = 0;
+    int imageHeight = 0;
+    bool done = false;
+    uchar hold[16];
+    State state = Header;
+
+    const int readBufferSize = 40960; // 40k read buffer
+    QByteArray readBuffer(device->read(readBufferSize));
+
+    if (readBuffer.isEmpty()) {
+        device->seek(oldPos);
+        return;
+    }
+
+    // This is a specialized version of the state machine from decode(),
+    // which doesn't do any image decoding or mallocing, and has an
+    // optimized way of skipping SkipBlocks, ImageDataBlocks and
+    // Global/LocalColorMaps.
+
+    while (!readBuffer.isEmpty()) {
+        int length = readBuffer.size();
+        const uchar *buffer = (const uchar *) readBuffer.constData();
+        while (!done && length) {
+            length--;
+            uchar ch = *buffer++;
+            switch (state) {
+            case Header:
+                hold[count++] = ch;
+                if (count == 6) {
+                    state = LogicalScreenDescriptor;
+                    count = 0;
+                }
+                break;
+            case LogicalScreenDescriptor:
+                hold[count++] = ch;
+                if (count == 7) {
+                    imageWidth = LM(hold[0], hold[1]);
+                    imageHeight = LM(hold[2], hold[3]);
+                    globalColormap = !!(hold[4] & 0x80);
+                    globalColorCount = 2 << (hold[4] & 0x7);
+                    count = 0;
+                    colorCount = globalColorCount;
+                    if (globalColormap) {
+                        int colorTableSize = 3 * globalColorCount;
+                        if (length >= colorTableSize) {
+                            // skip the global color table in one go
+                            length -= colorTableSize;
+                            buffer += colorTableSize;
+                            state = Introducer;
+                        } else {
+                            colorReadCount = 0;
+                            state = GlobalColorMap;
+                        }
+                    } else {
+                        state=Introducer;
+                    }
+                }
+                break;
+            case GlobalColorMap:
+            case LocalColorMap:
+                hold[count++] = ch;
+                if (count == 3) {
+                    if (++colorReadCount >= colorCount) {
+                        if (state == LocalColorMap)
+                            state = TableImageLZWSize;
+                        else
+                            state = Introducer;
+                    }
+                    count = 0;
+                }
+                break;
+            case Introducer:
+                hold[count++] = ch;
+                switch (ch) {
+                case 0x2c:
+                    state = ImageDescriptor;
+                    break;
+                case 0x21:
+                    state = ExtensionLabel;
+                    break;
+                case 0x3b:
+                    state = Done;
+                    break;
+                default:
+                    done = true;
+                    state = Error;
+                }
+                break;
+            case ImageDescriptor:
+                hold[count++] = ch;
+                if (count == 10) {
+                    int newLeft = LM(hold[1], hold[2]);
+                    int newTop = LM(hold[3], hold[4]);
+                    int newWidth = LM(hold[5], hold[6]);
+                    int newHeight = LM(hold[7], hold[8]);
+
+                    if (imageWidth/10 > qMax(newWidth,200))
+                        imageWidth = -1;
+                    if (imageHeight/10 > qMax(newHeight,200))
+                        imageHeight = -1;
+
+                    if (imageWidth <= 0)
+                        imageWidth = newLeft + newWidth;
+                    if (imageHeight <= 0)
+                        imageHeight = newTop + newHeight;
+
+                    *imageSizes << QSize(imageWidth, imageHeight);
+
+                    localColormap = !!(hold[9] & 0x80);
+                    localColorCount = localColormap ? (2 << (hold[9] & 0x7)) : 0;
+                    if (localColorCount)
+                        colorCount = localColorCount;
+                    else
+                        colorCount = globalColorCount;
+
+                    count = 0;
+                    if (localColormap) {
+                        int colorTableSize = 3 * localColorCount;
+                        if (length >= colorTableSize) {
+                            // skip the local color table in one go
+                            length -= colorTableSize;
+                            buffer += colorTableSize;
+                            state = TableImageLZWSize;
+                        } else {
+                            colorReadCount = 0;
+                            state = LocalColorMap;
+                        }
+                    } else {
+                        state = TableImageLZWSize;
+                    }
+                }
+                break;
+            case TableImageLZWSize:
+                if (ch > max_lzw_bits)
+                    state = Error;
+                else
+                    state = ImageDataBlockSize;
+                count = 0;
+                break;
+            case ImageDataBlockSize:
+                blockSize = ch;
+                if (blockSize) {
+                    if (length >= blockSize) {
+                        // we can skip the block in one go
+                        length -= blockSize;
+                        buffer += blockSize;
+                        count = 0;
+                    } else {
+                        state = ImageDataBlock;
+                    }
+                } else {
+                    state = Introducer;
+                }
+                break;
+            case ImageDataBlock:
+                ++count;
+                if (count == blockSize) {
+                    count = 0;
+                    state = ImageDataBlockSize;
+                }
+                break;
+            case ExtensionLabel:
+                switch (ch) {
+                case 0xf9:
+                    state = GraphicControlExtension;
+                    break;
+                case 0xff:
+                    state = ApplicationExtension;
+                    break;
+                default:
+                    state = SkipBlockSize;
+                }
+                count = 0;
+                break;
+            case ApplicationExtension:
+                if (count < 11)
+                    hold[count] = ch;
+                ++count;
+                if (count == hold[0] + 1) {
+                    state = SkipBlockSize;
+                    count = 0;
+                }
+                break;
+            case GraphicControlExtension:
+                if (count < 5)
+                    hold[count] = ch;
+                ++count;
+                if (count == hold[0] + 1) {
+                    count = 0;
+                    state = SkipBlockSize;
+                }
+                break;
+            case NetscapeExtensionBlockSize: // fallthrough
+            case SkipBlockSize:
+                blockSize = ch;
+                count = 0;
+                if (blockSize) {
+                    if (length >= blockSize) {
+                        // we can skip the block in one go
+                        length -= blockSize;
+                        buffer += blockSize;
+                    } else {
+                        state = SkipBlock;
+                    }
+                } else {
+                    state = Introducer;
+                }
+                break;
+            case NetscapeExtensionBlock: // fallthrough
+            case SkipBlock:
+                ++count;
+                if (count == blockSize)
+                    state = SkipBlockSize;
+                break;
+            case Done:
+                done = true;
+                break;
+            case Error:
+                device->seek(oldPos);
+                return;
+            }
+        }
+        readBuffer = device->read(readBufferSize);
+    }
+    device->seek(oldPos);
+    return;
+}
+
 void QGIFFormat::fillRect(QImage *image, int col, int row, int w, int h, QRgb color)
 {
     if (w>0) {
@@ -765,7 +1011,7 @@ QGifHandler::QGifHandler()
     nextDelay = 0;
     loopCnt = 0;
     frameNumber = -1;
-    nextSize = QSize();
+    scanIsCached = false;
 }
 
 QGifHandler::~QGifHandler()
@@ -787,7 +1033,7 @@ bool QGifHandler::imageIsComing() const
         }
 
         int decoded = gifFormat->decode(&lastImage, (const uchar *)buffer.constData(), buffer.size(),
-                                        &nextDelay, &loopCnt, &nextSize);
+                                        &nextDelay, &loopCnt);
         if (decoded == -1)
             break;
         buffer.remove(0, decoded);
@@ -831,7 +1077,7 @@ bool QGifHandler::read(QImage *image)
         }
 
         int decoded = gifFormat->decode(&lastImage, (const uchar *)buffer.constData(), buffer.size(),
-                                        &nextDelay, &loopCnt, &nextSize);
+                                        &nextDelay, &loopCnt);
         if (decoded == -1)
             break;
         buffer.remove(0, decoded);
@@ -862,8 +1108,18 @@ bool QGifHandler::supportsOption(ImageOption option) const
 QVariant QGifHandler::option(ImageOption option) const
 {
     if (option == Size) {
-        if (imageIsComing())
-            return nextSize;
+        if (!scanIsCached) {
+            QGIFFormat::scan(device(), &imageSizes);
+            scanIsCached = true;
+        }
+        // before the first frame is read, or we have an empty data stream
+        if (frameNumber == -1)
+            return (imageSizes.count() > 0) ? QVariant(imageSizes.at(0)) : QVariant();
+        // after the last frame has been read, the next size is undefined
+        if (frameNumber >= imageSizes.count() - 1)
+            return QVariant();
+        // and the last case: the size of the next frame
+        return imageSizes.at(frameNumber + 1);
     } else if (option == Animation) {
         return true;
     }
@@ -883,7 +1139,11 @@ int QGifHandler::nextImageDelay() const
 
 int QGifHandler::imageCount() const
 {
-    return 0; // Don't know
+    if (!scanIsCached) {
+        QGIFFormat::scan(device(), &imageSizes);
+        scanIsCached = true;
+    }
+    return imageSizes.count();
 }
 
 int QGifHandler::loopCount() const
diff --git a/src/plugins/imageformats/gif/qgifhandler.h b/src/plugins/imageformats/gif/qgifhandler.h
index a6e520f..8e07aff 100644
--- a/src/plugins/imageformats/gif/qgifhandler.h
+++ b/src/plugins/imageformats/gif/qgifhandler.h
@@ -87,7 +87,8 @@ private:
     mutable int nextDelay;
     mutable int loopCnt;
     int frameNumber;
-    mutable QSize nextSize;
+    mutable QVector<QSize> imageSizes;
+    mutable bool scanIsCached;
 };
 
 QT_END_NAMESPACE
diff --git a/src/plugins/imageformats/ico/qicohandler.cpp b/src/plugins/imageformats/ico/qicohandler.cpp
index b2351fa..4edb87a 100644
--- a/src/plugins/imageformats/ico/qicohandler.cpp
+++ b/src/plugins/imageformats/ico/qicohandler.cpp
@@ -53,6 +53,7 @@
 #include <QtGui/QImage>
 #include <QtCore/QFile>
 #include <QtCore/QBuffer>
+#include <qvariant.h>
 // These next two structs represent how the icon information is stored
 // in an ICO file.
 typedef struct
@@ -772,6 +773,29 @@ QtIcoHandler::~QtIcoHandler()
     delete m_pICOReader;
 }
 
+QVariant QtIcoHandler::option(ImageOption option) const
+{
+    if (option == Size) {
+        QIODevice *device = QImageIOHandler::device();
+        qint64 oldPos = device->pos();
+        ICONDIRENTRY iconEntry;
+        if (device->seek(oldPos + ICONDIR_SIZE + (m_currentIconIndex * ICONDIRENTRY_SIZE))) {
+            if (readIconDirEntry(device, &iconEntry)) {
+                device->seek(oldPos);
+                return QSize(iconEntry.bWidth, iconEntry.bHeight);
+            }
+        }
+        if (!device->isSequential())
+            device->seek(oldPos);
+    }
+    return QVariant();
+}
+
+bool QtIcoHandler::supportsOption(ImageOption option) const
+{
+    return option == Size;
+}
+
 /*!
  * Verifies if some values (magic bytes) are set as expected in the header of the file.
  * If the magic bytes were found, it is assumed that the QtIcoHandler can read the file.
diff --git a/src/plugins/imageformats/ico/qicohandler.h b/src/plugins/imageformats/ico/qicohandler.h
index b9ef27e..394a5eb 100644
--- a/src/plugins/imageformats/ico/qicohandler.h
+++ b/src/plugins/imageformats/ico/qicohandler.h
@@ -62,6 +62,9 @@ public:
     
     static bool canRead(QIODevice *device);
     
+    bool supportsOption(ImageOption option) const;
+    QVariant option(ImageOption option) const;
+
 private:
     int m_currentIconIndex;
     ICOReader *m_pICOReader;